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You can do this but you need a PCB Editor Performance license to do it. Bascially schedule the net then using Constraint Manager create pin pairs of the net. Once this is done the pin pair groups are visible in Constraint Manager Physical Tab. You can assign a different PCSET to the different pin pairs.
In reply to steve:
I am using Allegro PCB Design XL 16.3S017 and I was able to schedule the nets, create the pin pairs of the net in the Physical tab, and assigned different PCSETs to each pin pair with my license. Do I still need the PCB Editor Performance license for it to perform a DRC on the physical constraints for pin pairs?
In reply to jackg23:
I've had success with the DRC's correctly showing errors and using PCSets for Pin Pairs. Make sure that after updating the Constraint Manager (CS) that you do a DRC udpate.
I am having some problems with routing, though. When routing traces (manually) between two pins of a pin pair, the line width always defaults to the NET line width, not the Pin Pair line width defined in the CS. The line width in the options control box shows the correct width, but that is not what is drawn. Then, I get a DRC that says the neck length is too long. I'm assuming that this is because the tool does not know which pair of pins I'm connecting until after the trace is completed. Does anyone know how to make the line width default to what is in the constraints manager?
In reply to Brando:
>>When routing traces (manually) between two pins of a pin pair, the line
width always defaults to the NET line width, not the Pin Pair line width
defined in the CS
Thereis was a bug - ensure that you've got the latest hotfix installed.
The pin-pair works nicely, but what if you dont have the luxury of having a pin to schedule. What if you need to connecto the sense line to the force line at a via or to the actual trace of the force line?
In reply to Jonah Stephenson:
I would create a pin pair for the force line and
leave the sense line as default. You can connect the sense line anywhere
on the force line or to a via and the width would not be the same as the pin pair constraint width.
Thanks Brando. I tried creating a pin pair between the force resource line and the DUT pin, and not creating a pair for the sense pin (leaving it as default). When I grab the force pin to in route mode it default to the Min line width of the net, not the Min of the pin pair. What am I doing wrong? The line width in the router shows I want 30 (the value I asigned to the force pin pair) when I grab the pin it only shows the route at 6 (default value).
That was actually my problem also. See the above reply from KHurana. I haven't installed the latest hotfix yet (waiting on the tools admin), but the release notes do address this issue. In the mean time, if I see a line width in the options control box that is different than the default, I just type over that value and then the line width is correct.
I will check that there is a newest hotfix, but I do believe my compay has the latest releases. Do you know that date of the latest hotfis release? Thank you for all your help!
It looks like it was fixed in hotfix 021 which was release 12-10-2010.
Look at item number 846352 of the README_CCR.txt:
846352 ALLEGRO_EDITOR DRC_CONSTR Route connect does not select the pin-pair width for routing.